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F. B. TORREY.

PULLEY SHEAVE. No. 356,670. Patented Jan.25,1887.

nrrn S ATES PATENT trio.

FRANCIS B. TORREY, OF BATH, MAINE.

' PULLEY- SHEAVE.

SPECIFICATION forming part of Letters Patent No. 356,670, dated January 25, 1887.

Application filed July 33, 1886.

To all whom it may concern.-

Be it known that I, FRANCIS B. Tonnnr, of Bath, in the county of Sagadahoc and State of Maine, have invented a new and useful Improvement in Pnlleyfiheares; and I do hereby declare that the following is a full, clear, and exact description of the same.

My invention is an improved pulley-sheave; and my object is to make economicallya light, strong, and durable sheave for pnlley blocks.

The invention consists of a wooden body compressed into a metallic rim.

In the accompanying drawings, Figure 1 represents a face view of my improved sheave. Fig. 2 shows a section of the wheel with flanges for holding the rim to the wood. Fig. 3 is a like view of the completed wheel. Fig. 4 shows a possible addition to the wheel. Fig. 5 is a detail sectional view showing the metal rim as formed without the flanges.

Heretofore sheaves have been made as in riphery, and of any approved metal or material, to receive the wear of the rope. The body of the sheave is a disk having a central hole for the bolt cut from board of wood, or of wood or straw pulp. The disk may be treated in any of the well-known ways to render it tough and durable. Being of proper size relative to the inner diameter of the rim, it is forced into the rim, so as to make the Serial No. 209,682. (No model.)

whole practically solid by the expansive force of the body. I may form the rim with flanges a a, which, after the body is in place, are bent down, or I may use separate flanges for the purpose; but all flanges may be omitted.

I contemplate strengthening large sheaves by driving metallic rods into the body before i l; is forced into the rim.

I am aware that wooden panels have been compressed and placed in spaces between the hub, rim, and spokes or arms of a cast-iron car-wheel, asin Vvatsons patent of the United States, No. 114,628, of 1871, and that a metal sheave having hub, spokes, and rim with wood faces is not new, and I do not broadly claim the compression, nor wood combined with a metal wheel. This only partially reduces the weight and cost. My invention lies in the body made wholly of wood, as specified,pressed into a rim, so that the body or main part of the sheave is of this light and snfficiently strong and cheap material, while the wearing-surface is of metal.

I claim as my invention- A sheave composed of a metallic rim having an outer grooved periphery and an inner cylindrical periphery, and a body of wood or like material compressed within the rim, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANGIS B. TORREY.

Witnesses:

F. L. MIDDLETON, 0. L. STURTEVANT. 

